This is the sixth annual Doodle 4 Google contest, in which American students are asked to draw Google's logo according to a specific theme. Last year, 114,000 students submitted doodles with the theme: "If I could travel in time, I'd visit..." This year, they're supposed to capture their "best day ever" in Google Doodle form.

And the prizes are pretty hefty. The winner receives a $30K college scholarship, $50K tech grant for his or her school, trip to New York, Google Chromebook, Wacom digital design tablet, and a tee-shirt.